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Table 2 ER/PR/HER2 status of the primary tumor and CTCs in CK-positive breast cancer patients

From: Expression of truncated human epidermal growth factor receptor 2 on circulating tumor cells of breast cancer patients

Early breast cancer patients

 

HER2 primary

ER primary

PR primary

HER2in + HER2ext + CK+

HER2in + HER2ext-CK+

HER2in-HER2ext-CK+

1

+

+

+

0

0

2

2

-

+

+

0

0

1

3

-

+

+

1

0

0

4

+

-

+

0

0

1

5

-

+

+

0

0

1

6

-

+

-

1

3

0

7

-

-

+

1

0

4

8

-

  

0

0

1

9

-

+

+

1

0

0

10

-

+

+

2

0

0

11

-

+

+

0

0

1

12

-

+

+

2

0

0

13

-

+

+

9

4

0

14

+

  

2

0

0

15

-

  

0

0

2

16

-

+

+

3

0

0

17

-

-

+

0

0

1

18

+

+

+

1

0

0

    

First-line metastatic breast cancer patients

 

HER2 primary

ER primary

PR primary

HER2in + HER2ext + CK+

HER2in + HER2ext-CK+

HER2in-HER2ext-CK+

1

+

  

5

0

0

2

-

+

-

0

1

2

3

-

+

+

100

0

0

4

+

-

-

0

0

1

5

-

+

-

0

0

1

6

-

+

+

1

0

0

7

+

-

-

1

1

0

8

-

-

+

0

0

1

9

+

+

+

1

0

0

10

-

+

+

0

0

8

11

-

+

+

2

1

1

12

+

+

+

0

2

1

13

-

+

+

0

0

1

14

   

0

1

1

15

+

-

-

1

0

0

16

   

0

0

1

17

+

-

-

1

0

0

18

+

-

-

0

1

0

19

+

-

-

0

0

1

20

-

+

+

2

1

1

21

-

-

-

0

1

1

22

 

+

+

3

2

20

23

+

+

+

0

0

2

  1. Abbreviations: ER estrogen receptor, PR progesterone receptor, HER2 human epidermal growth factor receptor 2, CTCs circulating tumor cells; CK cytokeratin